SCHEDULED MAINTENANCE
Irradiation in the presence of benzophenone and oxygen of nitrogen-containing heterocycles having an NCO group yields products arising out of regioselective oxidation α to the nitrogen atom. Direct irradiation (in the absence of benzophenone and oxygen) of 5-methyl- and 5,5-dimethyl-hydantoins yields allophanates. The first step of this reaction involves the homolysis of the C(4)–C(5) bond of the hydantoin.
J. Gramain and R. Remuson, J. Chem. Soc., Perkin Trans. 1, 1982, 2341 DOI: 10.1039/P19820002341
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